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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - fusion opportunity"
href="https://llvm.org/bugs/show_bug.cgi?id=26967">26967</a>
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<th>Summary</th>
<td>fusion opportunity
</td>
</tr>
<tr>
<th>Product</th>
<td>Polly
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Optimizer
</td>
</tr>
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<th>Assignee</th>
<td>polly-dev@googlegroups.com
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</tr>
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<th>Reporter</th>
<td>zinob@codeaurora.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16046" name="attach_16046" title="opt -polly -polly-opt-isl -O3 -debug -polly-process-unprofitable -polly-opt-fusion=max foo.ll 2> Ofoo -polly-opt-simplify-deps=no">attachment 16046</a> <a href="attachment.cgi?id=16046&action=edit" title="opt -polly -polly-opt-isl -O3 -debug -polly-process-unprofitable -polly-opt-fusion=max foo.ll 2> Ofoo -polly-opt-simplify-deps=no">[details]</a></span>
opt -polly -polly-opt-isl -O3 -debug -polly-process-unprofitable
-polly-opt-fusion=max foo.ll 2> Ofoo -polly-opt-simplify-deps=no
1) can we make Isl hoist preheader outside loop?
if (n >= 1) {
Stmt_for_body_lr_ph();
Stmt_for_body17_lr_ph();
Stmt_for_body5_lr_ph();
}
for (int c0 = 0; c0 < n; c0 += 1) {
Stmt_for_body(c0);
Stmt_for_body5(c0);
Stmt_for_body17(c0);
if (c0 == 0)
Stmt_for_body29_lr_ph();
Stmt_for_body29(c0);
}
}
2) Loop fusion occurs only if -polly-opt-simplify-deps=no? why?</pre>
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